51545460 has 24 divisors (see below), whose sum is σ = 144327456. Its totient is φ = 13745440.

The previous prime is 51545449. The next prime is 51545471. The reversal of 51545460 is 6454515.

It is an interprime number because it is at equal distance from previous prime (51545449) and next prime (51545471).

It is a super-2 number, since 2×51545460² = 5313868893223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429486 + ... + 429605.

It is an arithmetic number, because the mean of its divisors is an integer number (6013644).

Almost surely, 2^51545460 is an apocalyptic number.

It is an amenable number.

51545460 is an abundant number, since it is smaller than the sum of its proper divisors (92781996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51545460 is a wasteful number, since it uses less digits than its factorization.

51545460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859103 (or 859101 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 51545460 is about 7179.5166968258. The cubic root of 51545460 is about 372.1603829185.

Adding to 51545460 its reverse (6454515), we get a palindrome (57999975).

The spelling of 51545460 in words is "fifty-one million, five hundred forty-five thousand, four hundred sixty".